I put ChatGPT-4o and 5.1 through 9 real-world tests — from logic puzzles to coding, writing and image analysis.

These are the skills that companies are actively, sometimes desperately, seeking right now. Get ready to peek behind the curtain and see what it really takes to get noticed in today's competitive job ...

Nope, LeetCode needs you to be online. You have to be connected to the internet to see the problems, send in your code, and ...

Get instant feedback while coding. Pyrefly processes 1.8M lines per second, adds smart imports, and supports Visual Studio Code and NeoVim.